<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style type="text/css">
      .grid {
        margin: auto;
        width: 530px;
        text-align: center;
      }
      .grid table {
        border-top: 1px solid #c2d89a;
        width: 100%;
        border-collapse: collapse;
      }
      .grid th,
      td {
        padding: 10;
        border: 1px dashed #f3dcab;
        height: 35px;
        line-height: 35px;
      }
      .grid th {
        background-color: #f3dcab;
      }
      .grid .book {
        padding-bottom: 10px;
        padding-top: 5px;
        background-color: #f3dcab;
      }
      .grid .total {
        height: 30px;
        line-height: 30px;
        background-color: #f3dcab;
        border-top: 1px solid #c2d89a;
      }
    </style>
  </head>

  <body>
    <div id="app">
      <div class="grid">
        <h1>图书管理</h1>
        <div class="book">
          <div>
            <label for="id"> 编号： </label>

            <input type="text" id="id" v-model="id" :disabled="flag" v-focus />

            <label for="name"> 名称： </label>
            <input type="text" id="name" v-model="name" />
            <button @click="handle" :disabled="submitFlag">提交</button>
          </div>
        </div>
        <div class="total">
          <span>图书总数: </span>
          <span>{{total}}</span>
        </div>
        <table>
          <thead>
            <tr>
              <th>编号</th>
              <th>名称</th>
              <th>时间</th>
              <th>操作</th>
            </tr>
          </thead>
          <tbody>
            <tr :key="item.id" v-for="item in books">
              <td>{{item.id}}</td>
              <td>{{item.name}}</td>
              <td>{{item.date | format('yyyy-MM-dd hh:mm:ss')}}</td>
              <td>
                <a href="" @click.prevent="toEdit(item.id)">修改</a>
                <span>|</span>
                <a href="" @click.prevent="deleteBook(item.id)">删除</a>
              </td>
            </tr>
          </tbody>
        </table>
      </div>
    </div>
    <script type="text/javascript" src="js/vue.js"></script>
    <script type="text/javascript">
      Vue.directive("focus", {
        inserted: function (el) {
          el.focus();
        },
      });
      Vue.filter("format", function (value, arg) {
        function dateFormat(date, format) {
          if (typeof date === "string") {
            var mts = date.match(/(\/Date\((\d+)\)\/)/);
            if (mts && mts.length >= 3) {
              date = parseInt(mts[2]);
            }
          }
          date = new Date(date);
          if (!date || date.toUTCString() == "Invalid Date") {
            return "";
          }
          var map = {
            M: date.getMonth() + 1, //月份
            d: date.getDate(), //日
            h: date.getHours(), //小时
            m: date.getMinutes(), //分
            s: date.getSeconds(), //秒
            q: Math.floor((date.getMonth() + 3) / 3), //季度
            S: date.getMilliseconds(), //毫秒
          };
          format = format.replace(/([yMdhmsqS])+/g, function (all, t) {
            var v = map[t];
            if (v !== undefined) {
              if (all.length > 1) {
                v = "0" + v;
                v = v.substr(v.length - 2);
              }
              return v;
            } else if (t === "y") {
              return (date.getFullYear() + "").substr(4 - all.length);
            }
            return all;
          });
          return format;
        }
        return dateFormat(value, arg);
      });
      var vm = new Vue({
        el: "#app",
        data: {
          flag: false,
          submitFlag: false,
          id: "",
          name: "",
          books: [],
        },
        methods: {
          handle: function () {
            if (this.flag) {
              // 编辑图书
              // 就是根据当前的ID去更新数组中对应的数据
              this.books.some((item) => {
                if (item.id == this.id) {
                  item.name = this.name;
                  // 完成更新后终止操作，
                  return true;
                }
              });
              this.flag = false;

              // 清空表单
              this.id = "";
              this.name = "";
            } else {
              var book = {};
              book.id = this.id;
              book.name = this.name;
              book.date = "";
              this.books.push(book);
              this.id = "";
              this.name = "";
            }
          },
          toEdit: function (id) {
            // 静止修改ID
            this.flag = true;
            debugger;
            // console.log(id);
            //根据ID查询出要编辑的数据
            var book = this.books.filter(function (item) {
              return item.id == id;
            });
            this.id = book[0].id;
            this.name = book[0].name;
          },
          deleteBook: function (id) {
            this.books = this.books.filter(function (item) {
              return item.id != id;
            });
          },
        },
        computed: {
          total: function () {
            return this.books.length;
          },
        },
        watch: {
          name: function (val) {
            // 验证图书名称是否已经存在
            var flag = this.books.some(function (item) {
              return item.name == val;
            });
            if (flag) {
              // 图书名称存在
              this.submitFlag = true;
            } else {
              // 图书名称存在
              this.submitFlag = false;
            }
          },
        },
        mounted: function () {
          // 该生命周期钩子函数被触发的时候，模板已经可以使用
          // 一般此时用于获取后台数据，然后把数据填充到模板
          var data = [
            {
              id: 1,
              name: "三国演义",
              date: 2525609975000,
            },
            {
              id: 2,
              name: "水浒传",
              date: 2525609975000,
            },
            {
              id: 3,
              name: "红楼梦",
              date: 2525609975000,
            },
            {
              id: 4,
              name: "西游记",
              date: 2525609975000,
            },
          ];
          this.books = data;
        },
      });
    </script>
  </body>
</html>
